Karlson. Gulls Simplified. Princeton University Press.
芝加哥风格引文Karlson. Gulls Simplified. Princeton University Press.
MLA引文Karlson. Gulls Simplified. Princeton University Press.
警告：这些引文格式不一定是100％准确.
APA引文
Karlson. Gulls Simplified. Princeton University Press.
芝加哥风格引文Karlson. Gulls Simplified. Princeton University Press.
MLA引文Karlson. Gulls Simplified. Princeton University Press.